Simplify rounded Edges
Not sure how it will work for your, since you geometry seems to have been exported from some kind of solid modeling application and is quite messy but you could try cleaning up your mesh a little bit first.


Start by removing all duplicate geometry by selecting all and W Menu > Remove Doubles
Convert all triangles to quads with Alt + J
Select all edge loops belonging to the bevel (success of this step depends on how clean you geometry will become after previous steps)
Delete these loops with X > Edge loops



You may have trouble doing so on your mesh because of the triangulated gemoetry